Preamble Example 1

\documentclass{book}
\usepackage{biblatex}
\addbibresource{lir.bib}
\usepackage{graphicx}
\usepackage{pdfpages}
\usepackage{enumitem} % so we can resume a list
\usepackage{listings}
\lstset{
  basicstyle=\small\ttfamily,
  xleftmargin=24pt
}
\usepackage{amsmath}
\usepackage{amssymb}
%\hypersetup{
%    colorlinks,
%    citecolor=black,
%    filecolor=black,
%    linkcolor=black,
%    urlcolor=black
%}

\usepackage{fontspec}
\setmainfont{LiberationSerif}[
  Extension = .otf,
  UprightFont = *-Regular,
  BoldFont = *-Bold,
  ItalicFont = *-Italic,
  BoldItalicFont = *-BoldItalic
]
\setmonofont{LiberationMono}[
  Extension = .otf,
  UprightFont = *,
  BoldFont = *-Bold,
  ItalicFont = *-Italic,
  BoldItalicFont = *-BoldItalic
]

\title{What A Pile Of Bobbins}
\author{John D. Allsup}
\date{Zeroth Draft, \today}

\newcommand{\commandment}[1]{\emph{#1}}
\newcommand{\expletive}{\texttt{<expletive>}}
\newcommand{\BibleVerseNumber}[1]{\textsuperscript{#1}}
\newcommand{\BibleRef}[1]{\hbox{#1}}
\newcommand{\Attrib}[1]{\hbox{--- \textit{#1}}}
\newcommand{\BibleAttrib}[1]{\hbox{--- #1}}
\newcommand{\z}{\hfil\break}
%\newcommand{\strong}[1]{\textbf{#1}}
\newcommand{\etc}{\textit{etc.}}
\newcommand{\etal}{\textit{et al.}}
\newcommand{\eg}{\textit{e.g.}}
\newcommand{\ie}{\textit{i.e.}}
\newcommand{\ordinal}[1]{\textsuperscript{#1}}
\newcommand{\nth}{\ordinal{th}}
\newcommand{\nd}{\ordinal{nd}}
\newcommand{\st}{\ordinal{st}}
\newcommand{\daj}{Duty And Joy}
\newcommand{\hhref}[1]{\href{#1}{#1}}
\newcommand{\phd}{Ph{.}D{.}}
\newcommand{\mphil}{M{.}Phil{.}}

\usepackage{ntheorem}
\newtheorem{defn}{Definition}

%\usepackage{hyperref}
%\hypersetup{colorlinks}
\def\href#1#2{\texttt{#1}}
\begin{document}
...
\end{document}